Back in January, I published Bar Hopping: Theme and Variations on a Bar Chart.. This was a very popular visualization, and I so I started working on a Line Chart variation. Meanwhile, Andy Cotgreave had the same idea and so we decided to collaborate on this one. The variations include other chart types, which are variations of form. For example, the slopegraph, area chart, small multiples, and parallel coordinates. However, there are also variations of style, for example, a line chart with dots.